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Ontario

$138+ Cheap flights from LaGuardia, NY (LGA) to Ontario (ONT)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 4/14. Fares are subject to change and may not be available on all flights or dates of travel.
LGA — ONT
Apr 21 — Apr 281
Tue 4/21
Tue 4/28
1 adult, Economy
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Cheap flight deals from LaGuardia to Ontario

Cheapest flights from LaGuardia to Ontario
Explore the most affordable flight options available from LaGuardia to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on March 22, 2026.

This CheapOair deal was found by Cheapflights users on 3/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/710:00 pm
LGA
-
ONT
1 stop28h 56m
Frontier
Tue 4/148:15 am
ONT
-
LGA
1 stop10h 49m
Frontier
Deal found 3/17$250
This Trip.com deal was found by Cheapflights users on 3/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/710:00 pm
LGA
-
ONT
1 stop28h 56m
Frontier
Tue 4/218:15 am
ONT
-
LGA
1 stop10h 49m
Frontier
Deal found 3/18$254
This CheapOair deal was found by Cheapflights users on 3/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/710:00 pm
LGA
-
ONT
1 stop28h 56m
Frontier
Thu 4/96:20 am
ONT
-
LGA
1 stop11h 39m
Frontier
Deal found 3/19$255
This CheapOair deal was found by Cheapflights users on 3/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 4/510:00 pm
LGA
-
ONT
1 stop28h 56m
Frontier
Tue 4/148:15 am
ONT
-
LGA
1 stop10h 49m
Frontier
Deal found 3/21$260
This Trip.com deal was found by Cheapflights users on 3/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/710:00 pm
LGA
-
ONT
1 stop28h 56m
Frontier
Sat 4/188:00 am
ONT
-
LGA
1 stop11h 04m
Frontier
Deal found 3/19$262
This Booking.com deal was found by Cheapflights users on 3/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/710:00 pm
LGA
-
ONT
1 stop28h 56m
Frontier
Wed 4/158:15 am
ONT
-
LGA
1 stop10h 49m
Frontier
Deal found 3/19$263
This Trip.com deal was found by Cheapflights users on 3/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 4/1210:00 pm
LGA
-
ONT
1 stop28h 56m
Frontier
Sat 4/188:00 am
ONT
-
LGA
1 stop11h 04m
Frontier
Deal found 3/21$274
This United Airlines deal was found by Cheapflights users on 3/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/222:20 pm
LGA
-
ONT
1 stop10h 30m
United Airlines
Tue 4/285:10 am
ONT
-
LGA
1 stop7h 40m
United Airlines
Deal found 3/18$276
This Trip.com deal was found by Cheapflights users on 3/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/910:00 pm
LGA
-
ONT
1 stop28h 56m
Frontier
Wed 4/158:15 am
ONT
-
LGA
1 stop10h 49m
Frontier
Deal found 3/21$278
This Trip.com deal was found by Cheapflights users on 3/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/910:00 pm
LGA
-
ONT
1 stop28h 56m
Frontier
Sat 4/188:00 am
ONT
-
LGA
1 stop11h 04m
Frontier
Deal found 3/19$279

Find flight deals from LaGuardia to Ontario

Discover tips and strategies to find the most affordable flight options for your journey from LaGuardia (LGA) to Ontario (ONT). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated March 22, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$252
(Trip.com)

One-way from

$138
(Kiwi.com)

Popular in

December

Cheapest in

October

Average price

$484
Provider with most accurate pricing for New York LaGuardia-Ontario flight deals.
Search Deals
Provider most trusted by Cheapflights users for New York LaGuardia-Ontario flights.
Search Deals
From New York LaGuardia to Ontario
Search Deals
One-way flight from New York LaGuardia to Ontario
Search Deals
Highest demand for flights based on searches. 7% potential increase in price ($33 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease ($23 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in March 2026
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from LaGuardia to Ontario that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated March 22, 2026.
Use the filters below to find and compare flights from New York LaGuardia Airport to Ontario that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

New YorkOntario

LGA - ONT

LGAONT

New York LaGuardia

Wed 5/6

7:15 am-3:05 pm

2 stops10h 50m

Ontario

Tue 5/12

10:30 am-10:45 pm

2 stops9h 15m

$291

New YorkOntario

LGA - ONT

LGAONT

New York LaGuardia

Wed 5/27

4:30 pm-11:34 pm

2 stops10h 04m

Ontario

Mon 6/1

9:50 am-11:44 pm

2 stops10h 54m

$322

New YorkOntario

LGA - ONT

LGAONT

New York LaGuardia

Tue 5/5

2:50 pm-10:35 pm

2 stops10h 45m

Ontario

Wed 5/6

6:59 pm-10:18 am

2 stops12h 19m

$401

New YorkOntario

LGA - ONT

LGAONT

New York LaGuardia

Wed 4/8

3:20 pm-10:31 pm

1 stop10h 11m

Ontario

Wed 4/15

7:00 am-5:13 pm

1 stop7h 13m

$404

New YorkOntario

LGA - ONT

LGAONT

New York LaGuardia

Thu 4/16

3:00 pm-10:40 pm

2 stops10h 40m

Ontario

Sun 4/19

11:55 pm-12:45 pm

1 stop9h 50m

$407

New YorkOntario

LGA - ONT

LGAONT

New York LaGuardia

Mon 5/4

4:29 pm-10:35 pm

1 stop9h 06m

Ontario

Thu 5/7

7:00 am-6:18 pm

1 stop8h 18m

$467

New YorkOntario

LGA - ONT

LGAONT

New York LaGuardia

Fri 5/22

2:46 pm-11:34 pm

2 stops11h 48m

Ontario

Wed 5/27

9:50 am-11:25 pm

2 stops10h 35m

$500

New YorkOntario

LGA - ONT

LGAONT

New York LaGuardia

Sat 4/11

5:15 pm-10:31 pm

1 stop8h 16m

Ontario

Thu 4/16

5:10 am-5:23 pm

1 stop9h 13m

$507

New YorkOntario

LGA - ONT

LGAONT

New York LaGuardia

Thu 5/7

2:20 pm-9:58 pm

1 stop10h 38m

Ontario

Sun 5/10

6:00 am-4:38 pm

1 stop7h 38m

$512
Quickest round-trip

New YorkOntario

LGA - ONT

LGAONT

New York LaGuardia

Fri 4/17

5:15 pm-10:31 pm

1 stop8h 16m

Ontario

Sun 4/19

5:10 am-3:50 pm

1 stop7h 40m

$527

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/17

Showing 1-10 of 21 resultsSorted by cheapest first
1
2
3

Compare providers for flights from LaGuardia to Ontario

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from LaGuardia to Ontario in March.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on New York LaGuardia Airport-Ontario flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on New York LaGuardia Airport-Ontario flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from New York LaGuardia Airport-Ontario flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on New York LaGuardia Airport-Ontario flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for New York LaGuardia Airport-Ontario flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from LaGuardia to Ontario

Have a flexible travel schedule? Discover the best time to fly to Ontario from LaGuardia with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from New York LaGuardia Airport to Ontario

What is the cheapest month to book a flight from New York LaGuardia Airport to Ontario?

Currently, May is the cheapest month in which you can book a flight from New York LaGuardia Airport to Ontario (average of $148). Flying from New York LaGuardia Airport to Ontario in December is currently the most expensive (average of $229). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

Reviews of airlines servicing Ontario

Get insights into the airlines that provide service to Ontario. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Ontario. Reviews last updated March 22, 2026.
See what other customers who have flown with Southwest,Delta, andUnited Airlines from New York LaGuardia Airport to Ontario have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.0
Very good
4,324 reviews

Overall

8.0

Comfort

8.0

Entertainment

7.5

Crew

8.6

Food

7.0

Boarding

8.1

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.
Southwest
8.0
Very good
4,324 reviews
Southwest
8.0
Very good
4,324 reviews

Overall

8.0

Comfort

8.0

Entertainment

7.5

Crew

8.6

Food

7.0

Boarding

8.1

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.
Delta
7.9
Good
8,314 reviews
Southwest
8.0
Very good
4,324 reviews

Overall

8.0

Comfort

8.0

Entertainment

7.5

Crew

8.6

Food

7.0

Boarding

8.1

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.
United Airlines
7.4
Good
9,455 reviews
Southwest
8.0
Very good
4,324 reviews

Overall

8.0

Comfort

8.0

Entertainment

7.5

Crew

8.6

Food

7.0

Boarding

8.1

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.
American Airlines
7.1
Good
11,488 reviews
Southwest
8.0
Very good
4,324 reviews

Overall

8.0

Comfort

8.0

Entertainment

7.5

Crew

8.6

Food

7.0

Boarding

8.1

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.
Frontier
5.7
Fair
3,018 reviews
Southwest
8.0
Very good
4,324 reviews

Overall

8.0

Comfort

8.0

Entertainment

7.5

Crew

8.6

Food

7.0

Boarding

8.1

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.

Related info for your journey

Find useful and relevant information for your journey from LaGuardia to Ontario. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly into for flights to Ontario from New York LaGuardia?

    Located just 3.1 mi from the city center, Ontario is the airport most travelers will use when flying to Ontario from New York LaGuardia. Booking flights from New York LaGuardia to Ontario (ONT) should be relatively easy as there are 0 daily inbound flights from New York LaGuardia from 5 different airlines.

  • How long is the flight from New York LaGuardia Airport to Ontario?

    A quick flight from New York LaGuardia Airport to Ontario can take about 10h 04m. Southwest provides one of the quickest options available for as low as $322. The distance between New York LaGuardia Airport and Ontario is about 2417 mi. Both multi-stop and nonstop flights can be found to your destination and back.

  • What are the cheapest airlines flying from New York LaGuardia Airport to Ontario round-trip?

    Frontier, at $159, was found to be the cheapest airline from New York LaGuardia Airport to Ontario.Alternate airlines to your destination round-trip include American Airlines and Southwest. Frontier is currently priced 61% below the average price you’ll pay for this route.

  • What are the cheapest airlines to fly from New York LaGuardia Airport to Ontario one-way?

    The cheapest airline one-way is Southwest, with whom users have recently found tickets for as low as $96. However, be on the lookout for offers from Frontier and American Airlines, as they are both options that can get you from New York LaGuardia Airport to Ontario for a low price.

  • Can I find deals for flights from LaGuardia to Ontario that include hotel bookings?

    Yes. In addition to deals on LaGuardia to Ontario flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from LaGuardia to Ontario?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from LaGuardia to Ontario.

  • Can I find deals for business class flights from LaGuardia to Ontario?

    Yes. Cheapflights offers flight deals from LaGuardia to Ontario by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from New York LaGuardia Airport to Ontario?

    Currently, May is the cheapest month in which you can book a flight from New York LaGuardia Airport to Ontario (average of $148). Flying from New York LaGuardia Airport to Ontario in December is currently the most expensive (average of $229). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

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Alternative routes for LaGuardia to Ontario

See prices for flight routes from nearby airports that may be better suited for you.
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Stewart to San Diego flights
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Newark to Monterey flights
Newark to Medford flights

Top 5 airlines flying from LaGuardia to Ontario

Discover the top 5 airlines that operate flights from LaGuardia to Ontario. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated March 22, 2026.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$159Average$314FlexibilityNo cancel feeOn-time62%
American AirlinesCheapest$180Average$396FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$192Average$502FlexibilityNo cancel feeOn-time63%
United AirlinesCheapest$227Average$494FlexibilityNo cancel feeOn-time69%
DeltaCheapest$270Average$444FlexibilityNo cancel feeOn-timeN/A

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